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mb/starlabs/starbook/mtl: Enable DDC for DDIA

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Enable DDC so that GOP can read the backlight brightness from EDID. This
avoids FSP repeatedly trying and failing to read it, and also stops the
backlight brightness not being restored correctly in Linux.

Change-Id: Icd292ee175a14799fe08c0989ca3fdccd5ccc123
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86895
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
This commit is contained in:
Sean Rhodes 2025-03-17 15:05:40 +00:00
commit ebe3501828
1 changed files with 1 additions and 1 deletions
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src/mainboard/starlabs/starbook/variants/mtl/devicetree.cb
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@ -45,7 +45,7 @@ chip soc/intel/meteorlake
register "ddi_port_A_config" = "1"
register "ddi_ports_config" = "{
[DDI_PORT_A] = DDI_ENABLE_HPD,
[DDI_PORT_A] = DDI_ENABLE_HPD | DDI_ENABLE_DDC,
[DDI_PORT_B] = DDI_ENABLE_HPD | DDI_ENABLE_DDC,
[DDI_PORT_1] = DDI_ENABLE_HPD,
[DDI_PORT_2] = DDI_ENABLE_HPD,